For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningSteering Angle Sensor Calibration Warning
Warning: For vehicles with electric power steering (EPS) and without
a vehicle stability enhancement program, the steering angle sensor
MUST always be calibrated after the battery has been disconnected. Failure to
calibrate the steering angle sensor could limit the operation
of the EPS system ...
Object Detection System Messages
PARK ASSIST OFF
This message displays when the park assist system has been turned off or when
there is a temporary condition causing the system to be disabled.
SERVICE PARK ASSIST
This message displays if there is a problem with the Ultrasonic Rear Parking
Assist (URPA) system. Do not use thi ...
Servicing the Airbag-Equipped Vehicle
Airbags affect how the vehicle should be serviced. There are parts of the airbag
system in several places around the vehicle. Your dealer and the service manual
have information about servicing the vehicle and the airbag system.
WARNING
For up to 10 seconds after the vehicle is turned off and ...